74216644 has 12 divisors (see below), whose sum is σ = 130140864. Its totient is φ = 37033544.

The previous prime is 74216627. The next prime is 74216647. The reversal of 74216644 is 44661247.

It is a super-2 number, since 2×74216644² = 11016220493245472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74216647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16432 + ... + 20455.

It is an arithmetic number, because the mean of its divisors is an integer number (10845072).

Almost surely, 2^74216644 is an apocalyptic number.

It is an amenable number.

74216644 is a deficient number, since it is larger than the sum of its proper divisors (55924220).

74216644 is a wasteful number, since it uses less digits than its factorization.

74216644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37394 (or 37392 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 74216644 is about 8614.9082409507. The cubic root of 74216644 is about 420.2429508957.

The spelling of 74216644 in words is "seventy-four million, two hundred sixteen thousand, six hundred forty-four".